LT3954IUHE

LED Driver IC Overview

The LT3954IUHE is a DC/DC converter designed for LED lighting applications, operating as a constant-current source and constant-voltage regulator. It features an internal low-side N-channel switch capable of handling up to 5A output current. The device supports input voltages ranging from 4.5V to 40V and offers adjustable switching frequencies between 100kHz and 1MHz. It integrates an internal PWM generator for dimming control and is housed in a 36-lead WFQFN exposed pad package.

LED Driver IC Feature Summary

• Integrates an internal low-side N-channel power switch for compact design
• Supports multiple topologies including buck, boost, SEPIC, and flyback configurations
• Features an internal PWM generator for precise LED dimming control

LED Driver IC Applications

• LED lighting drivers
• Constant-current LED regulation
• Constant-voltage LED regulation
• Buck-boost LED converter circuits

LED Driver IC Procurement Notes

Verify the specific ordering suffix (e.g., #PBF vs #TRPBF) to confirm packaging type, such as tube or tape and reel. Ensure the component meets RoHS compliance requirements if specified by the project standards. Cross-reference the exact part number with the manufacturer's latest datasheet to confirm pinout and thermal characteristics before procurement.

LED Driver IC Selection Notes

Select this component when a high-efficiency LED driver with integrated switching capability is required. Consider the 40V maximum input voltage limit and 5A current capacity against load requirements. Evaluate the need for internal PWM generation versus external dimming signals. Verify that the chosen topology aligns with the available input voltage range relative to the LED string forward voltage.

LED Driver IC Part Context

The LT3954 belongs to Analog Devices' family of high-performance LED converters. It is engineered for applications requiring flexible input voltage ranges and robust current regulation. The IUHE variant specifically denotes the leaded package option, distinguishing it from tape-and-reel versions like the TRPBF, while maintaining identical electrical performance specifications.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not provided in the available documentation. Users should consult Analog Devices for direct replacements or cross-reference compatible devices based on specific electrical parameters and package constraints.